Four prestigious American organizations concluded that there was not enough evidence/strong enough evidence/conclusive evidence/definitive evidence/replicable evidence. So, they will study the possibility for the next 20-to-30 years.

During World War II, governments gave cigarettes to soldiers. Presumably, smoking the cigarettes wasn't compulsory, but even for non-smokers, there was no way to avoid second-hand smoke so they might as well have been compulsory. Now, we have cellphones, and even dinosaurs who refuse to use cellphones cannot avoid the EMF of other people's cellphones.

In a nutshell, it is probably a conflict of interest for a hosting site that makes money from copyright infringement to encourage alleged copyright infringers to file DMCA counternotices. When a counternotice is filed, the copyright infringing content goes back up, and stays back up, unless or until the copyright owner finds the financial wherewithal to commence a federal lawsuit. Most copyright owners simply cannot afford to do that. The result is that their pirated works remain permanently available for the financial benefit of the site and the pirate, and the copyright owner gets nothing.